My HTT came with one battery and two 30# propane tanks. I swapped the tanks and battery locations so now I have 2-12v batteries where the tanks were, and one 30# propane tank where the single battery was. The next trailer will get 2 golf cart batteries. And I found only one source for a single 30# tank cover, but at least I found one.
I have a Honda 2000i generator and added a stand-alone 55-amp converter in the forward compartment. When on the generator it'll handle the battery charge, fridge, and a few other items easily. For the price difference I opted for the 2000 over the 1000 and I'm glad I did.
On point #4 - you're talking 70AH but that's at 12 volts. The generator amp output is at 120 volts. For round numbers 7.5 amps at 120 volts would equate to 75 amps at 12 volts (assuming 100% converter efficiency.) Realistically a 1000 watt generator would run a 50-60 amp converter but not much else. The 2000 watt genny gives you a cushion for more 120vac stuff. Actually the converter load is higher since they run 14.4 volts or so at first then ramp down.
